whats wrong with my cougar the battery aint charging just replaced the alt and had the battery checked

Asked by Feb 11, 2017 at 03:22 AM about the 2002 Mercury Cougar 2 Dr I4 Hatchback

Question type: Maintenance & Repair

its a 2002 2.0 4 cillender

8 Answers

98,495

The computer controls the charging, so may need to have the system live data scanned to see if the computer is turning the alternator on or you have broken wiring in the charging circuits.

1 of 1 people found this helpful.
1,895

a new alternator . should not charge a low batt. The batt should be charged in that case . Get a multi meter and check your voltage ,batt should be 12.5 V at the batt and with the car running you should get about 14

50,765

Check for battery voltage at the big wire on the alternator with the engine turned off and the key off. If you lack battery voltage then I would suspect the fusible link in that wire is open (bad). Also check the small wires at the alternator to see if they are parted under the insulation near the connector.

1 of 1 people found this helpful.

thank you all but is there a chance it can be the mega fuse in or dos the 02 have them

98,495

Possibly, did something else happen before or during the replacement of parts? You could just check for power on the large wire on the back of the alternator, if it has power then it's not a main fuse. I think we thought that those would have already been checked.

Best Answer Mark helpful
50,765

Maybe follow some of the suggestions and stop trying to make it difficult?

that's what it was thanks

98,495

Great, checking powers and grounds are always the first step, then move onto componet testing.

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